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Harry Potter turns 36 same day as new book's release

Video includes clips from Warner Bros. Pictures, NBCUniversal, BBC and Pottermore and images from Getty Images. Music provided courtesy of APM Music.

Potterheads, brace yourselves. "Harry Potter and the Cursed Child" has been released.

The latest installment of the magical series hit the market Sunday -- the same day as J.K. Rowling's and Harry Potter's birthdays -- but the highly anticipated script release was breaking records even before it made it to stores.

"The Cursed Child" reportedly beat the presale record at Barnes & Noble set by "Harry Potter and the Deathly Hallows" in 2007. An executive at the bookseller expects the newly released script to be the company's "biggest selling book of the year."

And it looks like publishers need the boost. Since January 2015, the industry has seen a 6.7 percent decline in revenue and e-book sales have gone down 25 percent.

In February, Rowling clarified that that the new release would be a script of the London stage production, not a novel, not a prequel and not a sequel, but "The Cursed Child" can still be considered the eighth story.

"While Harry grapples with a past that refuses to stay where it belongs, his youngest son Albus must struggle with the weight of a family legacy he never wanted," a description on the play’s website reads. "As past and present fuse ominously, both father and son learn the uncomfortable truth: Sometimes, darkness comes from unexpected places."